Cita APA (7a ed.)

Eckersley, C. (1961). A Modern English Course [Tapa y portada]. Longmans.

Cita Chicago Style (17a ed.)

Eckersley, C.E. A Modern English Course [Tapa Y Portada]. Hong Kong: Longmans, 1961.

Cita MLA (9a ed.)

Eckersley, C.E. A Modern English Course [Tapa Y Portada]. Longmans, 1961.